package ch01.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Demo07 {
    public static void main(String[] args) {
        try{
            Class clz=Class.forName("ch01.reflect.entity.Person");
            //获取Person的无参构造：public Person（）
            Constructor c1=clz.getDeclaredConstructor();
            //Person的无参构造为public,这里可以直接访问
            Object obj=c1.newInstance();
            System.out.println(obj);

            //获取Person的单选构造：private Person(String)
            Constructor c2=clz.getDeclaredConstructor(String.class);
            //Person的单参构造为private,这里以超出其访问范围，不能直接访问
            //通过setAccessable方法，设定为可以访问
            c2.setAccessible(true);
            obj=c2.newInstance("New Person");
            System.out.println(obj);

            //获取Person的三大构造：protected Person(String ,String ,String)
            Constructor c3=clz.getDeclaredConstructor(String.class,String.class,String.class);
            //Person的三大构造为protected，这里已超出其访问范围，不能直接访问
            //通过setAccessable方法，设定为可以访问
            c3.setAccessible(true);
            obj=c3.newInstance("New Person","beijing","Hello");
            System.out.println(obj);
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}
